Photovoltaic power generation device with easy-to-mount structure of components

Abstract

The application discloses a photovoltaic power generation device with an easy-to-mount component structure, relates to the technical field of photovoltaic power generation, and comprises an inclined block, a connecting plate, a cylinder, a gear, an elongated rod, a ladder block and an L-shaped rod. The gear is rotatably installed at the bottom of a machine box, the cylinder is fixedly installed at the bottom of the gear, the inclined block is slidably installed in the machine box, one end of the connecting plate is fixedly installed on the side of the inclined block away from the machine box, the elongated rod is fixedly installed at the other end of the connecting plate, the solid block is fixedly installed at the bottom of the machine box, and the L-shaped rod is slidably installed in the solid block. The photovoltaic panel has enough buffer distance when being impacted, can have certain buffer effect when being subjected to strong wind or special conditions, can be protected to some extent, and can avoid being damaged to affect subsequent use.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power generation technology, specifically to a photovoltaic power generation device with an easy-to-install module structure. Background Technology

[0002] A photovoltaic (PV) power generation device with an easy-to-install structure is a device used for photovoltaic power generation, designed to convert solar energy.

[0003] Patent publication number CN211127690U relates to a photovoltaic power generation device with an easy-to-install component structure, including a fixed protective sleeve. A photovoltaic power generation panel is fixedly connected inside the fixed protective sleeve. A fixed end cover is rotatably connected to one end of a fixed mounting base. Support springs are fixedly connected to both ends of the fixed end cover. A fixed clamping plate is fixedly connected to the end of the support spring away from the fixed end cover. A fastening clamping plate is fixedly connected to one end of the fixed end cover. In this photovoltaic power generation device with an easy-to-install component structure, the fixed slider moves the photovoltaic power generation panel through the fixed protective sleeve, causing several fixed protective sleeves to fit tightly together. By rotating the fixed end cover, the fixed end cover and the fixed protective sleeve are kept perpendicular. The fixed protective sleeve is pressed tightly by the fastening clamping plate. At the same time, the fixed clamping plate enters the slot of the fixed mounting base under the action of the support spring.

[0004] In the aforementioned patent, the protective sleeve is pressed by a fastening plate, and at the same time, the fastening plate enters the slot of the mounting base under the action of the support spring. However, there are still problems. The installation process is relatively cumbersome, and it is difficult to guarantee the impact on the solar panel when it is subjected to impact. The fixed protective sleeve may affect the solar panel. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a photovoltaic power generation device with an easy-to-install component structure, thus solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a photovoltaic power generation device with an easy-to-install component structure, comprising a housing, wherein a solar panel is disposed inside the housing, and an installation mechanism is disposed at the bottom of the housing;

[0007] The mounting mechanism includes a wedge block, a connecting plate, a cylinder, a gear, a long rod, a ladder block, and an L-shaped rod. The gear is rotatably mounted on the bottom of the housing, the cylinder is fixedly mounted on the bottom of the gear, the wedge block is slidably mounted inside the housing, one end of the connecting plate is fixedly mounted on the side of the wedge block away from the housing, the long rod is fixedly mounted on the other end of the connecting plate, the solid block is fixedly mounted on the bottom of the housing, the L-shaped rod is slidably mounted inside the solid block, and a toothed groove is formed on the circumferential surface of the bottom of the cylinder.

[0008] The bottom of the casing is equipped with a heat dissipation mechanism for further heat dissipation of the solar panel and an adjustment mechanism for angle adjustment. When the limit of the telescopic bar is released, the inner wall of the casing will become horizontal. When the ladder moves, it will drive the connecting plate to move. When the connecting plate moves, it will drive the inclined block to move. When the inclined block moves, it will release the restriction on the inside of the casing.

[0009] According to the above technical solution, the installation mechanism includes a long rod, a solid block, a movable lever, and a telescopic lever. The solid block has a toothed groove on the side near the gear, and the long rod has a toothed groove on the side near the gear. The movable lever is fixedly installed on the side of the L-rod near the gear, and the front end of the movable lever is a movable plate. The telescopic lever is slidably installed inside the housing. When the L-rod returns to its original position, the inclined block will reposition the solar panel, and at the same time, the telescopic lever will push upward to separate the solar panel from the inner wall of the housing, making its heat dissipation more effective.

[0010] According to the above technical solution, the tooth groove of the L rod meshes with the gear, the tooth groove of the long rod meshes with the tooth groove of the cylinder, the telescopic bar contacts the ladder block, and a No. 1 spring is provided inside the telescopic bar, which can prevent the telescopic bar from damaging the solar panel. At the same time, the elastic extension and retraction of the telescopic bar can also ensure that the solar panel has sufficient buffer distance when it is impacted.

[0011] According to the above technical solution, the heat dissipation mechanism includes a fixed block, a fan, a rotating column, a geared disc, a slider, a long column, an elastic telescopic rod, and a geared ring. The fixed block is fixedly installed on the back of the housing. The fan is rotatably installed inside the fixed block. The slider is slidably installed on the bottom of the housing. The geared disc is rotatably installed on the bottom of the slider. The rotating column is fixedly installed on the bottom of the geared disc. The long column is fixedly installed on the bottom of the rotating column. The elastic telescopic rod is fixedly installed on the bottom of the long column. The geared ring is rotatably installed on the bottom of the housing. When the slider moves, it drives the geared disc to move. When the geared disc moves, it meshes with the geared ring. When the fan on the fixed block is rotated by wind force, it drives the rotating column to rotate via a belt.

[0012] According to the above technical solution, the heat dissipation mechanism further includes a fixed rod, a heat dissipation fan, a blade, and a sieve plate. The fixed rod is fixedly installed on the inner wall of the toothed ring, the heat dissipation fan is fixedly installed on the circumferential surface of the fixed rod, the blade is fixedly installed on the circumferential surface of the heat dissipation fan, and the sieve plate is fixedly installed on the bottom of the machine box. When the fixed rod rotates, it will drive the heat dissipation fan to rotate. When the heat dissipation fan rotates, it will drive the blade to rotate. When the blade rotates, it will cut the weeds.

[0013] According to the above technical solution, the movable lever contacts the slider, the gear plate meshes with the gear ring, the fan and the rotating column are driven by a belt, and the fixed rod is equipped with a roller brush inside. When the external wind force is too strong, the fan will rotate at a higher speed. When the fan speed is too high, the elastic telescopic rod on the long column will extend outward due to centrifugal force.

[0014] According to the above technical solution, the adjustment mechanism includes an elastic telescopic column, an elastic telescopic block, a long plate, a connecting plate, a square plate, a force-bearing plate, and a locking plate. The fixed end of the elastic telescopic column is rotatably mounted on the bottom of the housing, and the free end of the elastic telescopic column has a locking groove. The fixed end of the elastic telescopic block is fixedly mounted on the fixed end of the elastic telescopic column. One end of the long plate is fixedly mounted on the free end of the elastic telescopic block. The locking plate is fixedly mounted on the other end of the long plate. The connecting plate is fixedly mounted on the side of the long plate near the L-shaped rod. One end of the square plate is fixedly mounted on the side of the connecting plate near the gear. The force-bearing plate is fixedly mounted on the other end of the square plate. Due to the elastic extension and retraction of the elastic telescopic block, the locking plate will be locked into the locking groove of the elastic telescopic column and will not fall off randomly, allowing the elastic telescopic column to extend and retract to perform a certain angle adjustment.

[0015] According to the above technical solution, the elastic telescopic rod contacts the force plate, and the locking plate contacts the slot at the free end of the elastic telescopic column. When the limit at the free end of the elastic telescopic column is released, the position of the casing will become horizontal, thus avoiding the impact of strong winds on the casing.

[0016] This invention provides a photovoltaic power generation device with an easy-to-install component structure. It has the following beneficial effects:

[0017] (1) When the L rod returns to its original position, the inclined block will limit the solar panel again, enabling quick disassembly and assembly, avoiding damage to the solar panel caused by the telescopic bar. At the same time, the elastic extension and retraction of the telescopic bar can also prevent the solar panel from being impacted and provide sufficient buffer distance, thus preventing the solar panel from being subjected to strong winds or special circumstances. It can also provide some protection for the solar panel, preventing damage to the solar panel from affecting its subsequent use.

[0018] (2) In this invention, when the cooling fan rotates, it will drive the blade to rotate. When the blade rotates, it will cut the weeds. At the same time, the roller on the fixed rod will pull out the impurities cut on the screen plate. When the fixed rod rotates, it will drive the cooling fan to rotate. The fan plate will rotate by natural wind to dissipate heat from the solar panel, avoiding insufficient power during heat dissipation. At the same time, it can save manpower and avoid the roller personnel from frequently checking the heat dissipation device to avoid insufficient power, which greatly reduces the consumption of manpower.

[0019] (3) This invention allows the card plate to be inserted into the slot of the elastic telescopic column without falling off at will, and allows the elastic telescopic column to extend and retract to make a certain angle adjustment. When the limit of the free end of the elastic telescopic column is released, the position of the box will become horizontal, avoiding the impact of strong wind on the box. This is beneficial for the solar panel to reduce wind resistance and improve stability in windy weather. At the same time, it can also prevent the machine from being subjected to greater thrust due to its tilt in windy weather, which would cause greater damage to the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the bottom structure of the housing of the present invention;

[0022] Figure 3 This is a schematic diagram of the inclined block and telescopic bar structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the ladder block and telescopic bar structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the toothed disc and toothed ring structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the elastic telescopic block and long plate structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the square plate and the load-bearing plate structure of the present invention.

[0027] In the diagram: 1. Box; 201. Inclined block; 202. Connecting plate; 203. Cylinder; 204. Gear; 205. Long rod; 206. Ladder block; 207. Solid block; 208. L-shaped rod; 209. Movable lever; 210. Telescopic lever; 301. Fixed block; 302. Fan; 303. Rotating column; 304. Gear disc; 305. Slider; 306. Long column; 307. Elastic telescopic rod; 308. Gear ring; 309. Fixed rod; 310. Cooling fan; 311. Blade; 312. Sieve plate; 401. Elastic telescopic column; 402. Elastic telescopic block; 403. Long plate; 404. Connecting plate; 405. Square plate; 406. Force plate; 407. Clamping plate; 5. Solar panel. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-7 One embodiment of the present invention is: a photovoltaic power generation device with an easy-to-install component structure, including a housing 1, a solar panel 5 disposed inside the housing 1, and an installation mechanism disposed at the bottom of the housing 1;

[0030] The installation mechanism includes a wedge block 201, a connecting plate 202, a cylinder 203, a gear 204, a long rod 205, a step block 206, and an L-shaped rod 208. The gear 204 is rotatably mounted on the bottom of the housing 1, the cylinder 203 is fixedly mounted on the bottom of the gear 204, the wedge block 201 is slidably mounted inside the housing 1, one end of the connecting plate 202 is fixedly mounted on the side of the wedge block 201 away from the housing 1, the long rod 205 is fixedly mounted on the other end of the connecting plate 202, the solid block 207 is fixedly mounted on the bottom of the housing 1, and the L-shaped rod 208 is slidably mounted inside the solid block 207. The bottom circumferential surface of the cylinder 203 has a toothed groove, which can provide sufficient buffer distance when the solar panel 5 is impacted, and can also provide a certain buffering effect when the solar panel 5 is subjected to strong winds or special circumstances, and can also protect the solar panel 5 to a certain extent, preventing damage to the solar panel 5 from affecting its subsequent use.

[0031] The mounting mechanism includes a long rod 205, a solid block 207, a movable lever 209, and a telescopic lever 210. The solid block 207 has a toothed groove on the side near the gear 204, and the long rod 205 also has a toothed groove on the side near the gear 204. The movable lever 209 is fixedly installed on the side of the L-rod 208 near the gear 204, and the front end of the movable lever 209 is a movable plate. The telescopic lever 210 is slidably installed inside the housing 1. When the L-rod 208 returns to its original position, the inclined block 201 will reposition the solar panel 5, and at the same time, the telescopic lever 210 will push upward to separate the solar panel 5 from the inner wall of the housing 1, making its heat dissipation more effective.

[0032] The toothed groove of L-rod 208 meshes with gear 204, the toothed groove of long rod 205 meshes with the toothed groove of cylinder 203, and telescopic bar 210 contacts step block 206. A first spring is installed inside telescopic bar 210 to prevent telescopic bar 210 from damaging solar panel 5. At the same time, the elastic extension and retraction of telescopic bar 210 can also ensure that solar panel 5 has sufficient buffer distance when it is impacted.

[0033] In this embodiment, during operation: when the solar panel 5 needs to be placed into the housing 1, the L-rod 208 inside the solid block 207 is pulled. When the L-rod 208 is pulled, it drives the gear 204 to rotate. When the gear 204 rotates, it drives the cylinder 203 to rotate. When the cylinder 203 rotates, the teeth at its bottom push the long rod 205. When the long rod 205 moves, it drives the ladder block 206 to move. When the ladder block 206 moves, it releases the limit on the telescopic rod 210. When the limit on the telescopic rod 210 is released, the inner wall of the housing 1 becomes horizontal. When the ladder block 206 moves, it drives the connecting plate 202 to move. When the connecting plate 202 moves... When the device moves, it will cause the inclined block 201 to move. When the inclined block 201 moves, it will release the restriction on the inside of the housing 1, allowing the solar panel 5 to be placed into the housing 1. Then, the L rod 208 will be pushed back to its original position. When the L rod 208 returns to its original position, the inclined block 201 will restrict the solar panel 5 again. At the same time, the telescopic bar 210 will push upward, separating the solar panel 5 from the inner wall of the housing 1, making its heat dissipation more effective. At the same time, when the telescopic bar 210 continues to move upward, due to the elastic extension and retraction of the telescopic bar 210, it can avoid damage to the solar panel 5. In addition, the elastic extension and retraction of the telescopic bar 210 can also ensure that the solar panel 5 has sufficient buffer distance when it is impacted.

[0034] Please see Figures 1-7 Based on the above embodiments, in another embodiment of the present invention, the bottom of the housing 1 is provided with a heat dissipation mechanism for further heat dissipation of the solar panel 5 and an adjustment mechanism for angle adjustment. The heat dissipation mechanism includes a fixing block 301, a fan 302, a rotating column 303, a geared disc 304, a slider 305, a long column 306, an elastic telescopic rod 307, and a geared ring 308. The fixing block 301 is fixedly installed on the back of the housing 1, the fan 302 is rotatably installed inside the fixing block 301, the slider 305 is slidably installed on the bottom of the housing 1, and the geared disc 304 rotates... The rotating column 303 is fixedly installed at the bottom of the toothed disc 304, the long column 306 is fixedly installed at the bottom of the rotating column 303, the elastic telescopic rod 307 is fixedly installed at the bottom of the long column 306, and the toothed ring 308 is rotatably installed at the bottom of the housing 1. The fan plate is driven to rotate by natural wind to dissipate heat from the solar panel 5, avoiding insufficient power during heat dissipation. At the same time, it can also save manpower and avoid the need for roller roller personnel to frequently check the heat dissipation device to prevent insufficient power, greatly reducing manpower consumption.

[0035] The heat dissipation mechanism also includes a fixing rod 309, a cooling fan 310, a blade 311, and a sieve plate 312. The fixing rod 309 is fixedly installed on the inner wall of the toothed ring 308, the cooling fan 310 is fixedly installed on the circumferential surface of the fixing rod 309, the blade 311 is fixedly installed on the circumferential surface of the cooling fan 310, and the sieve plate 312 is fixedly installed on the bottom of the housing 1. When the fixing rod 309 rotates, it will drive the cooling fan 310 to rotate. When the cooling fan 310 rotates, it will drive the blade 311 to rotate. When the blade 311 rotates, it will cut the weeds.

[0036] The movable lever 209 contacts the slider 305, the gear plate 304 meshes with the gear ring 308, the fan 302 and the rotating column 303 are driven by a belt, and the fixed rod 309 is equipped with a roller brush. When the external wind force is too strong, the fan 302 will rotate at a higher speed. When the fan 302 rotates too fast, the elastic telescopic rod 307 on the long column 306 will extend outward due to centrifugal force.

[0037] The adjustment mechanism includes an elastic telescopic column 401, an elastic telescopic block 402, a long plate 403, a connecting plate 404, a square plate 405, a force-bearing plate 406, and a clamping plate 407. The fixed end of the elastic telescopic column 401 is rotatably mounted on the bottom of the housing 1, and the free end of the elastic telescopic column 401 has a clamping groove. The fixed end of the elastic telescopic block 402 is fixedly mounted on the fixed end of the elastic telescopic column 401. One end of the long plate 403 is fixedly mounted on the free end of the elastic telescopic block 402. The clamping plate 407 is fixedly mounted on the other end of the long plate 403. The connecting plate 404 is fixedly mounted on the side of the long plate 403 near the L-rod 208. One end of the square plate 405 is fixedly mounted on the side of the connecting plate 404 near the gear 204. The force-bearing plate 406 is fixedly mounted on the other end of the square plate 405. This mechanism helps the solar panel 5 reduce wind resistance and improve stability in windy weather. It also prevents the machine from being subjected to greater thrust due to its tilt in windy weather, thus avoiding greater damage to the equipment.

[0038] The elastic telescopic rod 307 contacts the force plate 406, and the clamping plate 407 contacts the groove at the free end of the elastic telescopic column 401. When the limit at the free end of the elastic telescopic column 401 is released, the position of the box 1 will become horizontal, thus avoiding the influence of strong winds on the box 1.

[0039] In this embodiment, when L-bar 208 is pulled out, it drives the movable lever 209 to move. When the movable lever 209 moves, it contacts the slider 305. However, since the movable lever 209 is rotatably connected near the cylinder 203, when it contacts the slider 305, its hinged plate rotates. When the movable lever 209 leaves the slider 305, its hinged plate returns to its original position. When L-bar 208 is pushed back, it drives the slider 305 to move. When the slider 305 moves, it drives the geared disc 304 to move. When the geared disc 304 moves, it meshes with the gear ring 308. When the fan 302 on the fixed block 301 rotates due to wind, it drives the rotating column 303 via a belt. When the rotating column 303 rotates, it drives the toothed disc 304 to rotate. When the toothed disc 304 rotates, it drives the toothed ring 308 to rotate. When the toothed ring 308 rotates, it drives the fixed rod 309 to rotate. When the fixed rod 309 rotates, it drives the cooling fan 310 to rotate. When the cooling fan 310 rotates, it drives the blade 311 to rotate. When the blade 311 rotates, it cuts the weeds. At the same time, the roller on the fixed rod 309 pulls the cut impurities off the sieve plate 312. When the external wind force is too strong, the speed of the fan 302 will be greater. When the speed of the fan 302 is too high, the elastic telescopic rod 307 on the long column 306 will extend outward due to centrifugal force.

[0040] When adjusting the angle of the machine box 1, the operator inserts the locking plate 407 into the slot at the free end of the elastic telescopic column 401. Due to the elastic extension and retraction of the elastic telescopic block 402, the locking plate 407 will be locked into the slot of the elastic telescopic column 401 and will not fall off at will, allowing the elastic telescopic column 401 to extend and retract, thereby adjusting the angle. When the external wind is too strong, the elastic telescopic rod 307 will come into contact with the force plate 406. When the free end of the elastic telescopic rod 307 comes into contact with the force plate 406, it will drive the force plate 406 to move. When the force plate 406 moves, it will drive the square plate 405 to move. When the square plate 405 moves, it will drive the connecting plate 404 to move. When the connecting plate 404 moves, it will drive the long plate 403 to move. When the long plate 403 moves, it will drive the clamping plate 407 to move. When the clamping plate 407 moves, it will release the limit on the free end of the elastic telescopic column 401. When the limit on the free end of the elastic telescopic column 401 is released, the position of the box 1 will become horizontal, avoiding the impact of strong wind on the box 1.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A photovoltaic power generation device with an easy-to-install component structure, comprising a housing (1), characterized in that: The box (1) is equipped with a solar panel (5) inside, and the bottom of the box (1) is equipped with an installation mechanism; The installation mechanism includes a wedge (201), a connecting plate (202), a cylinder (203), a gear (204), a long rod (205), a step block (206), and an L-shaped rod (208). The gear (204) is rotatably mounted on the bottom of the housing (1). The cylinder (203) is fixedly mounted on the bottom of the gear (204). The wedge (201) is slidably mounted inside the housing (1). One end of the connecting plate (202) is fixedly mounted on the side of the wedge (201) away from the housing (1). The long rod (205) is fixedly mounted on the other end of the connecting plate (202). The solid block (207) is fixedly mounted on the bottom of the housing (1). The L-shaped rod (208) is slidably mounted inside the solid block (207). The cylinder (203) has a toothed groove on its bottom circumferential surface. The bottom of the housing (1) is provided with a heat dissipation mechanism for further heat dissipation of the solar panel (5) and an adjustment mechanism for angle adjustment. The installation mechanism includes a long rod (205), a solid block (207), a movable lever (209), and a telescopic lever (210). The solid block (207) has a toothed groove on the side near the gear (204). The long rod (205) has a toothed groove on the side near the gear (204). The movable lever (209) is fixedly installed on the side of the L-rod (208) near the gear (204). The front end of the movable lever (209) is a movable plate. The telescopic lever (210) is slidably installed inside the housing (1). The tooth groove of the L rod (208) meshes with the gear (204), the tooth groove of the long rod (205) meshes with the tooth groove of the cylinder (203), the telescopic bar (210) contacts the ladder block (206), and a No. 1 spring is provided inside the telescopic bar (210). The heat dissipation mechanism includes a fixed block (301), a fan (302), a rotating column (303), a geared disc (304), a slider (305), a long column (306), an elastic telescopic rod (307), and a geared ring (308). The fixed block (301) is fixedly installed on the back of the housing (1). The fan (302) is rotatably installed inside the fixed block (301). The slider (305) is slidably installed at the bottom of the housing (1). The geared disc (304) is rotatably installed at the bottom of the slider (305). The rotating column (303) is fixedly installed at the bottom of the geared disc (304). The long column (306) is fixedly installed at the bottom of the rotating column (303). The elastic telescopic rod (307) is fixedly installed at the bottom of the long column (306). The geared ring (308) is rotatably installed at the bottom of the housing (1). The heat dissipation mechanism also includes a fixed rod (309), a heat dissipation fan (310), a blade (311), and a sieve plate (312). The fixed rod (309) is fixedly installed on the inner wall of the toothed ring (308), the heat dissipation fan (310) is fixedly installed on the circumferential surface of the fixed rod (309), the blade (311) is fixedly installed on the circumferential surface of the heat dissipation fan (310), and the sieve plate (312) is fixedly installed on the bottom of the housing (1). The movable lever (209) contacts the slider (305), the gear plate (304) meshes with the gear ring (308), the fan (302) and the rotating column (303) are driven by a belt, and a roller brush is provided inside the fixed rod (309); The adjustment mechanism includes an elastic telescopic column (401), an elastic telescopic block (402), a long plate (403), a connecting plate (404), a square plate (405), a force-bearing plate (406), and a clamping plate (407). The fixed end of the elastic telescopic column (401) is rotatably installed at the bottom of the housing (1). The free end of the elastic telescopic column (401) is provided with a clamping groove. The fixed end of the elastic telescopic block (402) is fixedly installed at the fixed end of the elastic telescopic column (401). One end of the long plate (403) is fixedly installed at the free end of the elastic telescopic block (402). The clamping plate (407) is fixedly installed at the other end of the long plate (403). The connecting plate (404) is fixedly installed on the side of the long plate (403) near the L rod (208). One end of the square plate (405) is fixedly installed on the side of the connecting plate (404) near the gear (204). The force-bearing plate (406) is fixedly installed at the other end of the square plate (405). The elastic telescopic rod (307) contacts the force plate (406), and the locking plate (407) contacts the slot at the free end of the elastic telescopic column (401).

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